sir*_*cco 7 javascript angularjs angularjs-directive angularjs-scope
我正在尝试将当前作用域中的变量传递给通过$ compile服务添加的指令.
我可以将一个字符串传递给child指令,但不传递给实际的对象.
这是场景的小提琴:http://jsfiddle.net/ewx2trvx/2/
HTML:
<section ng-app="myApp" ng-controller="MainCtrl">
<addbuttonsbutton></addbuttonsbutton>
<div id="space-for-buttons"></div>
</section>
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JS:
var myApp = angular.module('myApp', []);
function MainCtrl($scope) {
$scope.count = 0;
}
myApp.directive("addbuttonsbutton", function () {
return {
restrict: "E",
template: "<button addbuttons>Click to add buttons</button>"
}
});
//Directive for adding buttons on click that show an alert on click
myApp.directive("addbuttons", function ($compile) {
return function (scope, element, attrs) {
element.bind("click", function () {
scope.count++;
angular.element(document.getElementById('space-for-buttons'))
.append($compile("<alert alert='count'></alert>")(scope));
});
};
});
//Directive for showing an alert on click
myApp.directive("alert", function () {
return {
template: "<div><button class='btn btn-default'>Show alert # {{count}}</button></div>",
scope: {
a: '@alert'
},
replace:true,
link: function (scope, element, attrs) {
element.bind("click", function () {
console.log(scope.a);
alert("This is alert #" + scope.a);
});
}
};
});
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有什么想法吗?
谢谢.
首先,您需要在编译和追加后应用作用域,因为您在摘要循环之外操作 DOM:
element.bind("click", function () {
scope.count++;
angular.element(document.getElementById('space-for-buttons'))
.append($compile("<alert alert='count'></alert>")(scope));
scope.$apply();
});
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然后,由于您正在使用alert='count',因此您需要更改alert指令中的范围配置:
scope: {
a: '=alert'
},
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否则,如果您使用,a: '@alert'则需要将其插入到属性中,如下所示:alert='{{count}}'
最后,由于是双向数据绑定,您可以再分配一个中间基元属性来用作按钮的索引:
myApp.directive("alert", function () {
return {
template: "<div><button class='btn btn-default'>Show alert # {{index}}</button></div>",
scope: {
a: '=alert'
},
replace:true,
link: function (scope, element, attrs) {
scope.index = scope.a;
element.bind("click", function () {
alert("This is alert #" + scope.index);
});
}
};
});
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演示: http: //jsfiddle.net/ewx2trvx/3/
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